2 * drivers/usb/otg/nop-usb-xceiv.c
4 * NOP USB transceiver for all USB transceiver which are either built-in
5 * into USB IP or which are mostly autonomous.
7 * Copyright (C) 2009 Texas Instruments Inc
8 * Author: Ajay Kumar Gupta <ajay.gupta@ti.com>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 * This provides a "nop" transceiver for PHYs which are
26 * autonomous such as isp1504, isp1707, etc.
29 #include <linux/module.h>
30 #include <linux/platform_device.h>
31 #include <linux/dma-mapping.h>
32 #include <linux/usb/otg.h>
33 #include <linux/usb/nop-usb-xceiv.h>
34 #include <linux/slab.h>
36 struct nop_usb_xceiv {
41 static struct platform_device *pd;
43 void usb_nop_xceiv_register(void)
47 pd = platform_device_register_simple("nop_usb_xceiv", -1, NULL, 0);
49 printk(KERN_ERR "Unable to register usb nop transceiver\n");
53 EXPORT_SYMBOL(usb_nop_xceiv_register);
55 void usb_nop_xceiv_unregister(void)
57 platform_device_unregister(pd);
60 EXPORT_SYMBOL(usb_nop_xceiv_unregister);
62 static int nop_set_suspend(struct usb_phy *x, int suspend)
67 static int nop_set_peripheral(struct usb_otg *otg, struct usb_gadget *gadget)
78 otg->phy->state = OTG_STATE_B_IDLE;
82 static int nop_set_host(struct usb_otg *otg, struct usb_bus *host)
96 static int nop_usb_xceiv_probe(struct platform_device *pdev)
98 struct nop_usb_xceiv_platform_data *pdata = pdev->dev.platform_data;
99 struct nop_usb_xceiv *nop;
100 enum usb_phy_type type = USB_PHY_TYPE_USB2;
103 nop = kzalloc(sizeof *nop, GFP_KERNEL);
107 nop->phy.otg = kzalloc(sizeof *nop->phy.otg, GFP_KERNEL);
116 nop->dev = &pdev->dev;
117 nop->phy.dev = nop->dev;
118 nop->phy.label = "nop-xceiv";
119 nop->phy.set_suspend = nop_set_suspend;
120 nop->phy.state = OTG_STATE_UNDEFINED;
122 nop->phy.otg->phy = &nop->phy;
123 nop->phy.otg->set_host = nop_set_host;
124 nop->phy.otg->set_peripheral = nop_set_peripheral;
126 err = usb_add_phy(&nop->phy, type);
128 dev_err(&pdev->dev, "can't register transceiver, err: %d\n",
133 platform_set_drvdata(pdev, nop);
135 ATOMIC_INIT_NOTIFIER_HEAD(&nop->phy.notifier);
144 static int nop_usb_xceiv_remove(struct platform_device *pdev)
146 struct nop_usb_xceiv *nop = platform_get_drvdata(pdev);
148 usb_remove_phy(&nop->phy);
150 platform_set_drvdata(pdev, NULL);
157 static struct platform_driver nop_usb_xceiv_driver = {
158 .probe = nop_usb_xceiv_probe,
159 .remove = nop_usb_xceiv_remove,
161 .name = "nop_usb_xceiv",
162 .owner = THIS_MODULE,
166 static int __init nop_usb_xceiv_init(void)
168 return platform_driver_register(&nop_usb_xceiv_driver);
170 subsys_initcall(nop_usb_xceiv_init);
172 static void __exit nop_usb_xceiv_exit(void)
174 platform_driver_unregister(&nop_usb_xceiv_driver);
176 module_exit(nop_usb_xceiv_exit);
178 MODULE_ALIAS("platform:nop_usb_xceiv");
179 MODULE_AUTHOR("Texas Instruments Inc");
180 MODULE_DESCRIPTION("NOP USB Transceiver driver");
181 MODULE_LICENSE("GPL");